Speculatively launch Service Workers on mouse/touch events. [2/5]

chrome/browser/renderer_host/chrome_render_message_filter.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/chrome_render_message_filter.h"
 
 #include <stdint.h>
 
 #include <string>
 
@@ skipping 48 matching lines @@
 }
 
 ChromeRenderMessageFilter::~ChromeRenderMessageFilter() {
 }
 
 bool ChromeRenderMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChromeRenderMessageFilter, message)
     IPC_MESSAGE_HANDLER(NetworkHintsMsg_DNSPrefetch, OnDnsPrefetch)
     IPC_MESSAGE_HANDLER(NetworkHintsMsg_Preconnect, OnPreconnect)
+    IPC_MESSAGE_HANDLER(NetworkHintsMsg_NavigationHint, OnNavigationHint)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_UpdatedCacheStats,
                         OnUpdatedCacheStats)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_AllowDatabase, OnAllowDatabase)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_AllowDOMStorage, OnAllowDOMStorage)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(
         ChromeViewHostMsg_RequestFileSystemAccessSync,
         OnRequestFileSystemAccessSync)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_RequestFileSystemAccessAsync,
                         OnRequestFileSystemAccessAsync)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_AllowIndexedDB, OnAllowIndexedDB)
@@ skipping 42 matching lines @@
     return;
   }
   if (predictor_ && url.is_valid() && url.has_host() && url.has_scheme() &&
       url.SchemeIsHTTPOrHTTPS()) {
     predictor_->PreconnectUrl(url, GURL(),
                               chrome_browser_net::UrlInfo::EARLY_LOAD_MOTIVATED,
                               allow_credentials, count);
   }
 }
 
+void ChromeRenderMessageFilter::OnNavigationHint(
+    const GURL& url,
+    blink::WebNavigationHintType type) {
+  // TODO(horo): Implement this.

[kinuko, 2016/07/18 15:24:45]

I really don't think this should go through //chrome, could we have a TODO
comment here that having this in chrome is not really desirable/necessary and we
should consider moving this to //content?

[horo, 2016/07/19 02:09:43]

Done.

+}
+
 void ChromeRenderMessageFilter::OnUpdatedCacheStats(
     uint64_t min_dead_capacity,
     uint64_t max_dead_capacity,
     uint64_t capacity,
     uint64_t live_size,
     uint64_t dead_size) {
   web_cache::WebCacheManager::GetInstance()->ObserveStats(
       render_process_id_, min_dead_capacity, max_dead_capacity, capacity,
       live_size, dead_size);
 }
@@ skipping 210 matching lines @@
   rappor::SampleString(g_browser_process->rappor_service(), metric,
                        rappor::ETLD_PLUS_ONE_RAPPOR_TYPE, sample);
 }
 
 void ChromeRenderMessageFilter::OnRecordRapporURL(const std::string& metric,
                                                   const GURL& sample) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
                                           metric, sample);
 }